Imaging of vitro maxilla in rat periodontitis models based on X-ray absorption-contrast CT and X-ray phase-contrast CT
10.13929/j.issn.1003-3289.2020.05.003
- VernacularTitle: 基于X线同步辐射吸收CT和X线相衬CT牙周炎大鼠模型离体上颌骨成像
- Author:
Tingting YANG
1
Author Information
1. College of Biomedical Engineering and Technology, Tianjin Medical University
- Publication Type:Journal Article
- Keywords:
Maxilla;
Periodontitis;
Rats;
X-ray absorption-contrast imaging;
X-ray phase-contrast imaging
- From:
Chinese Journal of Medical Imaging Technology
2020;36(5):653-658
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To compare imaging characteristics of rat vitro maxilla based on X-ray absorption-contrast CT (ACCT) and X-ray phase-contrast CT (PCCT), and to explore the value of PCCT in evaluating rat periodontitis models. Methods: A total of 6 SD rats were randomly divided into periodontitis group and normal group (each n=3). In periodontitis group, "ligation of silk thread+high sugar feeding" method was used to establish periodontitis models, and the rats were given 10% high sugar viscous feed for 8 weeks, while rats in control group were given conventional feeding. After 8 weeks, ACCT and PCCT were performed on the right maxilla of rats in both groups, and imaging characteristics were analyzed. Then 3D images of the maxilla were reconstructed, and the distance between cemento-enamel junction and alveolar bone crest (CEJ-ABC) of rats were measured and compared between groups. Results: ACCT could not clearly display dental pulp, also difficult to distinguish the periodontal membrane soft tissue. The contrast of PCCT images were better, able to clearly show the microstructure of soft tissue and hard tissue of maxilla, and the quality of 3D images based on PCCT was better than that of ACCT. Compared with control group, CEJ-ABC increased significantly in periodontitis group (Z=-9.43, P<0.01). Conclusion: PCCT has more advantages in imaging of soft tissue and hard tissue of rat maxilla, which is of great value in assessment of maxilla in rat periodontitis models.
